export default {
	namespaced: true,
	
	state: ()=> ({
		//购物车数据
		cart: JSON.parse(uni.getStorageSync('cart') || '[]')
	}),
	
	mutations: {
		addToCart(state, goods) {
			const findResult = state.cart.find(x=>x.goods_id===goods.goods_id)
			if(!findResult) {
				state.cart.push(goods)
			} else {
				findResult.goods_count++
			}
			this.commit('m_cart/saveToStorage')
		},
		saveToStorage(state) {
			uni.setStorageSync('cart',JSON.stringify(state.cart))
		},
		updateGoodsState(state, goods) {
			const findResult = state.cart.find(x => x.goods_id === goods.goods_id)
			if(findResult) {
				findResult.goods_state = goods.goods_state
				this.commit('m_cart/saveToStorage')
			}
		},
		updateGoodsCount(state, goods) {
			const findResult = state.cart.find(x => x.goods_id === goods.goods_id) 
			if(findResult) {
				findResult.goods_count = goods.goods_count
				this.commit('m_cart/saveToStorage')
			}
		},
		removeGoodsById(state, goods_id) {
			state.cart = state.cart.filter(x => x.goods_id !== goods_id)
			this.commit('m_cart/saveToStorage')
		},
		updateAllGoodsState(state,e) {
			state.cart.forEach(x=>x.goods_state = e)
		}
	},
	
	getters: {
		//购物车中所有商品的数量
		total(state){
			// let c = 0
			// state.cart.forEach(goods => c += goods.goods_count)
			// return c
			return state.cart.reduce((total,item)=> total += item.goods_count,0)
		},
		//购物车中已选择商品的数量
		checkedCount(state) {
			return state.cart.filter(x => x.goods_state).reduce((total, item) => total += item.goods_count,0)
		},
		checkdeGoodsAmount(state) {
			return state.cart.filter(x => x.goods_state).reduce((total, item) => total += item.goods_count*item.goods_price,0).toFixed(2)
		}
	}
}